Fatal error: Uncaught Error: Class "Elastica\Aggregation\AbstractAggregation" not found in /var/www/html/w/vendor/ruflin/elastica/src/Aggregation/SumBucket.php:12 Stack trace: #0 {main} thrown in /var/www/html/w/vendor/ruflin/elastica/src/Aggregation/SumBucket.php on line 12